tanner.varin

Hey guys, I just had my 66 289 rebuilt and i was looking for some general estimates of crank horsepower after all of the things that were done to it. I don't have exact specifics, I was surprised by the project by my father and was only involved as far as being told what was done.
- it was machined
- has Holley Aluminum intake
- 4 barrel 650 Holley carb
- larger cam
- full length headers
- split exhaust
- high performance coil
- and i think slightly bigger heads?
I'm planning on having it Dynoed just so I know to fill the curiosity in me, but I was hoping for a rough estimate so I don't get surprised. Thanks fellas.

barnett468

hello, welcome to the forum.

first of all, not all dynos read the same, especially rear wheel dynos . . secondly, you have not provided enough info to make an informed guess.

Gun Jam

Put me in at 215 to 230hp to the wheels

-Gun

69mach1377

Try a free version of dyno2000...

racer_dave

without cam specs, head specs, piston specs there is no way to reasonably guess. Somewhere between 200 and 500 :-)

69mach1377

Yup...dyno 2000 asks for those specs. Not saying it's real accurate, but at least in the ballpark. But GIGO still applies.

barnett468

i will see your 500 hp and raise you 50.

Gun Jam

thats risky the winner is the one who ends up closest to the dyno reported HP without going over by more than 15hp

Each applicant is a allowed to guess a range value of 15hp...but if your top range puts you over by more than 15hp then the next closest guess that is below 15hp over true output wins!

racer_dave

Barnett468- I'll match your 50 and bump you 5. just in case he runs synthetic oil...

Choppertwo

Well, your kinda vague on the cam and heads, so I'm at 240-260 at the crank